Conveying device.



PATENTED MAY 7, 1907.

G; GRUHL. UONVEYING DEVICE.

: APPLIOATIOH FILED LUG- B, 1906.

Q r 1 1 a .CARL GRUHL, or BRUHL, GERMANY.

CONVEYING DEVICE.

Specification of Letters Patent.

Patented May '7, 1907.

Application filed August 6, 1906. Serial N0. 329,473

To all whom it may concern.-

Be it known that I, CARL GRUHL, a citizen of the German Empire, and aresident of Briihl, near Cologne, Germany, have invented certain new anduseful Improvements in and Relating to Conveying Devices, of which thefollowing is a specification.

In the manufacture of brown coal briquets the raw coal coming from thepit is, in the first place, disintegrated and then deposited as finecoal on the so-called coal loft, from where it is conveyedto the dryingapparatus. In order to make the drying process, as far as possible,independent of the hoisting and dressing, it is desirable to have alwaysa not too small quantity of fine coal on hand. If coal is drawn up onlyin the daytime it is necessary to store up the necessary stock of finecoal on the coal loft for continuing the drying during the night. Thisfine coal is then, during the night, conveyed to the drying-apparatus bymeans of shovels and carts. In the same degree as the heaps of coalgradually recede from the feed-openings of the drying-apparatus thislabor is made more difficult and costly. But the drying and theproduction of the whole factory entirely depends on a sufficient andassured conveyance of coal to the drying-apparatus.

The object of the present invention is to effect the conveyance of thefine-coal to the feed-openings of the dryin -apparatus in a mechanicalway. The fundamental condition for such a device for conveying the coalfrom the coal heap is that it always accommodates itself to the heightand changing wit its drivinggear, is not covered or encumbered by theline coal, and can work freely in every position. The device musttherefore be able to convey all the coal from the highest slope down tothe bottom of the coal loft to the drying devices.

A device of this kind is illustrated on the accompanying drawing inFigures 1 to 3. Fig. 1 shows a side-view of the device in two differentworking positions, Fig. 2 a view of the upper frame in its highestposition on the coal heap, seen from above. Fig. 3 is a top view of thelower frame working in its lowest position on the bottom of the coalloft.

Similar letters refer to similar parts throughout the several views.

In the main the device consists of two iron. frames, the upper frame aand the lower frame I). The upper frame a is journaled shape of the coalheaps and that it itself,

rigidly and, at the same time, turnably in eye-bearings on the shaft 0on one of the sides not facing the feed-openings z of the drying devices1), by which shaft the whole device is driven. The upper frame merelyserves as a scaffold for receiving and transmitting the driving-power tothe lower frame b. The latter forms the support and the guide for theforwarding device convey ng the coal from the heap C to the feed open nga, which may consist of a double chain (1 with scrapers e or similardevices attached to 1t.

Both frames 0, and b are connected on the sides facing the feed-openingsz of the drying-apparatus by joints f and can be ad usted at the sametime by a rope-pull g, by means of a rope-Windlass A, in accordance withthe height of the coal-heap C. In a like manner the lower frame I) canbe raised and lowered on its free end by a rope-pull h, by means of arope-Windlass B. As the upper frame a, as has already been stated. isrigidly journaled on the side not facing the feed-opening z of thedrying-devices 1;, both frames a and b can be accommodated to any heightand slope of the coal heap C. The lower frame I) carrying thetrail-chain or the like lies always on the surface of the coal-heap.

The trail-chain d, or the like, is driven by the shaft 0, by means ofthe toothed wheel gear i, 7c, above the upper frame a, through achain-wheel Z, a driving-chain m and a chainwheel a. The lattertransmits its motion through driving-chains and chain-wheels 0 to ashaft journaled in the lower frame 6, on which are fixed theguide-wheels g for the trail-chain d. The latter is thereby moved in thedirection indicated by the arrows in Fi 1.

Ilhe essential and new feature of the invention consists in'the use oftwo frames connected with each other in a manner that they can be turnedand shifted, but are otherzontal axle, being on one end fiXedlyjournaled,

detrimental oscillations, which will always show themselves with looselysuspended devices, are avoided.

This device is also suited for other industries, where there is aquestion of conveying material consisting of small pieces mechanicallyto a certain point (feed-opening).

What I claim as my invention and desire to secure by United StatesLetters Patent 1s In a device for conveying small pieces of material, incombination, two frames (1 and b, movably connected at one end, theframe a being pivoted to turn on its other end, and the frame I)carrying a trail chain (1 or the like, which frames can be raised andlowered at their connected ends, so that they can be adjusted to anyheight of the heap O, sub- 15 stantially as set forth In testimonywhereof I have signed my name to this specification in the presence oftwo subscribing witnesses.

CARL GRUHL.

Witnesses LOUIS VANDORN, CARL BoLLER.

